Q: Which of the following best describes the central dogma of molecular biology?

$$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$$

Question 1

Which of the following is NOT one of the five fundamental characteristics shared by all living organisms?

Accepted Answer

All organisms must be able to photosynthesize.

Question 2

Which statement best describes the difference between a scientific theory and a hypothesis?

Accepted Answer

A theory is an explanation for a broad class of phenomena supported by evidence, while a hypothesis is a testable statement explaining an observation.

Question 3

Louis Pasteur’s experiment with swan-necked flasks provided evidence against which hypothesis?

Accepted Answer

Spontaneous generation hypothesis

Question 4

Which of the following best describes the central dogma of molecular biology?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$$

Question 5

A mutation occurs in the DNA sequence of a gene. Which of the following is a possible consequence?

Accepted Answer

The mutation may change the protein produced, leading to heritable variation.

Question 6

Which of the following is an example of adaptation as defined in evolutionary biology?

Accepted Answer

A finch with a beak shape that increases its ability to eat available seeds, resulting in higher reproductive success.

Question 7

Which of the following is NOT a requirement for natural selection to occur in a population?

Accepted Answer

All individuals must have identical traits.

Question 8

In the experiment with desert ants, what was the main conclusion regarding how ants navigate back to their nest?

Accepted Answer

Ants use information on stride length and number to calculate distance.

Question 9

Which of the following best describes the relationship between genotype and phenotype?

Accepted Answer

Genotype is the genetic makeup, and phenotype is the observable traits resulting from protein expression.

Question 10

Which of the following is the correct way to write the scientific name for humans according to Linnaeus’ system?

Accepted Answer

Homo sapiens

Question 11

A biologist compares the DNA sequences of three species and finds that two species have fewer sequence differences between them than either does with the third. What can the biologist infer?

Accepted Answer

The two species with fewer differences are more closely related.

Question 12

Which of the following is a critical feature of a well-designed experiment?

Accepted Answer

Including a control group to account for other factors.

Question 13

Which of the following best explains why the food competition hypothesis for giraffe neck length was rejected?

Accepted Answer

Giraffes do not usually feed high in trees, contrary to the hypothesis’s prediction.

Question 14

Which of the following is NOT a domain in the modern taxonomic system?

Accepted Answer

Protista

Question 15

Which of the following statements about evolution is correct?

Accepted Answer

Evolution is a change in the characteristics of a population over time.

Question 16

Which of the following best describes the role of ATP in living organisms?

Accepted Answer

ATP provides chemical energy for cellular processes.

Question 17

Which of the following is an example of a null hypothesis in an experiment?

Accepted Answer

If the pedometer hypothesis is incorrect, then stride length and step number will have no effect on navigation.

Question 18

Which of the following is a correct statement about the structure of DNA?

Accepted Answer

DNA is a double helix with base pairs joined by hydrogen bonds.

Question 19

Which of the following is the best definition of a population in biology?

Accepted Answer

A group of individuals of the same species living in the same area at the same time.

Question 20

Which of the following is a real-world application of the chromosome theory of inheritance?

Accepted Answer

Predicting the likelihood of inheriting a genetic disorder based on parental genotypes.

Chapter 1: Biology – The Study of Life (Mini-Textbook Study Notes)

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